Sorry to revive.
Since I’m still trying to get my head fully around the OSSC, would it make sense to also explicitly support native X68000 resolutions 512×512 and 512×256? With 640×512 I’m able to adjust vertical size and position of the X68000 image, but not horizontal size & position. Would supporting these native resolutions enable that?
BTW I made a little (0.83) config for a BenQ BL912 (HDMI to DVI) for the X68000 (feel free to improve) to use with http://pbnl.byethost7.com/ossc/profiles/.
This is in passthrough for 640×512 if IRCC. So setting this to 2x would make it look better?